could you produce a rifle, minus any non milspec parts? and we sign a liability waiver

im compentent to build and test a firearm, just poor lol
Waivers are not worth the paper they consume and litigation defense is incredibly expensive.
In the automobile world essentially what you are asking for is to have Ford, GM or whoever offer a DIY car. They supply the basics and you supply some of the parts and some labor. When it doesn't work properly who is on the hook to make it work? Who are the lawyers going to go after in the event of something bad happening. The guys with the potential to pay out large settlements, not the guy who botched the assembly and has no insurance or assets to lay claim to.
Our insurance is VERY clear on the fact that we do NOT sell untested or partially assembled proprietary firearms, period.
We could completely re-design our rifles to employ more milspec parts, but that would A) be extremely expensive, B) require yet another opportunity for the SFSS/RCMP to deem our rifles as restricted as it would need to be inspected again for possible classification changes and C) would rather defeat what we have done.
The only milspec parts in our lowers is the mag release, button and spring, the front take down pin, detent and spring and the grip screw, so a total of 7 parts worth about $20.00
Sorry but short answer is no. We already make a black rifle that will accept 95% of the milspec parts available, it is called an AT15, but it is restricted but costs far less. Being as it is so close to any other AR15 we
can sell stripped uppers and lowers with impunity, but the rest of the firearms we manufacture are different enough to be proprietary.
The biggest mistake we find is that guys seem to think that our Modern series rifles are just another AR because they are similar in looks, design and operation but they are also VERY different in many respects from an AR, which is why they are not legally classified as an AR variant.